The application of Hough transform for fast interaction vertex position estimation in heavy-ion collisions

Abstract

Charged particle track reconstruction in silicon detectors of collider experiments in high-multiplicity events, such as heavy-ion collisions at LHC, is a difficult and resource-demanding process. The first phase of the procedure is the formation of seeds composed out of a few signals per track. A high number of actual particles results in a combinatorial explosion of the number of seeds. A priori knowledge of the collision vertex position would allow discarding non-viable track seeds early in the reconstruction procedure, reducing the overall computing requirements for the track reconstruction. The method proposed in this paper uses the Hough transform for estimating the position of the interaction vertex without the necessity of reconstructing the tracks first. It offers admissible resolution with linear scaling of numerical complexity with the multiplicity of tracks.

References in corpus (6)

• Muon reconstruction performance of the ATLAS detector in proton--proton collision data at $\sqrt{s}$=13 TeV
• Centrality dependence of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• The Angantyr model for Heavy-Ion Collisions in PYTHIA8
• Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at sqrt(s_NN) = 2.76 TeV with the ATLAS detector
• A Common Tracking Software Project
• Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.44 TeV